accel/tcg: Move TARGET_TAGGED_ADDRESSES to TCGCPUOps.untagged_addr

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/accel/tcg/cpu-ops.h

@@ -157,6 +157,13 @@ struct TCGCPUOps {
      */
     void (*record_sigbus)(CPUState *cpu, vaddr addr,
                           MMUAccessType access_type, uintptr_t ra);
+
+    /**
+     * untagged_addr: Remove an ignored tag from an address
+     * @cpu: cpu context
+     * @addr: tagged guest address
+     */
+    vaddr (*untagged_addr)(CPUState *cs, vaddr addr);
 #else
     /** @do_interrupt: Callback for interrupt handling.  */
     void (*do_interrupt)(CPUState *cpu);

include/user/guest-host.h

@@ -10,7 +10,7 @@
 
 #include "exec/vaddr.h"
 #include "user/guest-base.h"
-#include "cpu.h"
+#include "accel/tcg/cpu-ops.h"
 
 /*
  * If non-zero, the guest virtual address space is a contiguous subset
@@ -29,12 +29,14 @@ extern unsigned long reserved_va;
  */
 extern unsigned long guest_addr_max;
 
-#ifndef TARGET_TAGGED_ADDRESSES
 static inline vaddr cpu_untagged_addr(CPUState *cs, vaddr x)
 {
+    const TCGCPUOps *tcg_ops = cs->cc->tcg_ops;
+    if (tcg_ops->untagged_addr) {
+        return tcg_ops->untagged_addr(cs, x);
+    }
     return x;
 }
-#endif
 
 /* All direct uses of g2h and h2g need to go away for usermode softmmu.  */
 static inline void *g2h_untagged(vaddr x)

target/arm/cpu-param.h

@@ -17,14 +17,9 @@
 #endif
 
 #ifdef CONFIG_USER_ONLY
-# ifdef TARGET_AARCH64
-#  define TARGET_TAGGED_ADDRESSES
-# ifdef __FreeBSD__
-#  define TARGET_PAGE_BITS 12
-# else
+# if defined(TARGET_AARCH64) && defined(CONFIG_LINUX)
 /* Allow user-only to vary page size from 4k */
 #  define TARGET_PAGE_BITS_VARY
-# endif
 # else
 #  define TARGET_PAGE_BITS 12
 # endif

target/arm/cpu.c

@@ -2671,7 +2671,31 @@ static const char *arm_gdb_get_core_xml_file(CPUState *cs)
     return "arm-core.xml";
 }
 
-#ifndef CONFIG_USER_ONLY
+#ifdef CONFIG_USER_ONLY
+/**
+ * aarch64_untagged_addr:
+ *
+ * Remove any address tag from @x.  This is explicitly related to the
+ * linux syscall TIF_TAGGED_ADDR setting, not TBI in general.
+ *
+ * There should be a better place to put this, but we need this in
+ * include/exec/cpu_ldst.h, and not some place linux-user specific.
+ *
+ * Note that arm-*-user will never set tagged_addr_enable.
+ */
+static vaddr aarch64_untagged_addr(CPUState *cs, vaddr x)
+{
+    CPUARMState *env = cpu_env(cs);
+    if (env->tagged_addr_enable) {
+        /*
+         * TBI is enabled for userspace but not kernelspace addresses.
+         * Only clear the tag if bit 55 is clear.
+         */
+        x &= sextract64(x, 0, 56);
+    }
+    return x;
+}
+#else
 #include "hw/core/sysemu-cpu-ops.h"
 
 static const struct SysemuCPUOps arm_sysemu_ops = {
@@ -2702,6 +2726,7 @@ static const TCGCPUOps arm_tcg_ops = {
 #ifdef CONFIG_USER_ONLY
     .record_sigsegv = arm_cpu_record_sigsegv,
     .record_sigbus = arm_cpu_record_sigbus,
+    .untagged_addr = aarch64_untagged_addr,
 #else
     .tlb_fill_align = arm_cpu_tlb_fill_align,
     .cpu_exec_interrupt = arm_cpu_exec_interrupt,

target/arm/cpu.h

@@ -783,12 +783,9 @@ typedef struct CPUArchState {
 #else /* CONFIG_USER_ONLY */
     /* For usermode syscall translation.  */
     bool eabi;
-#endif /* CONFIG_USER_ONLY */
-
-#ifdef TARGET_TAGGED_ADDRESSES
     /* Linux syscall tagged address support */
     bool tagged_addr_enable;
-#endif
+#endif /* CONFIG_USER_ONLY */
 } CPUARMState;
 
 static inline void set_feature(CPUARMState *env, int feature)
@@ -3217,34 +3214,7 @@ extern const uint64_t pred_esz_masks[5];
 #define TAG_GRANULE      (1 << LOG2_TAG_GRANULE)
 
 #ifdef CONFIG_USER_ONLY
-
 #define TARGET_PAGE_DATA_SIZE (TARGET_PAGE_SIZE >> (LOG2_TAG_GRANULE + 1))
-
-#ifdef TARGET_TAGGED_ADDRESSES
-/**
- * cpu_untagged_addr:
- * @cs: CPU context
- * @x: tagged address
- *
- * Remove any address tag from @x.  This is explicitly related to the
- * linux syscall TIF_TAGGED_ADDR setting, not TBI in general.
- *
- * There should be a better place to put this, but we need this in
- * include/exec/cpu_ldst.h, and not some place linux-user specific.
- */
-static inline target_ulong cpu_untagged_addr(CPUState *cs, target_ulong x)
-{
-    CPUARMState *env = cpu_env(cs);
-    if (env->tagged_addr_enable) {
-        /*
-         * TBI is enabled for userspace but not kernelspace addresses.
-         * Only clear the tag if bit 55 is clear.
-         */
-        x &= sextract64(x, 0, 56);
-    }
-    return x;
-}
-#endif /* TARGET_TAGGED_ADDRESSES */
 #endif /* CONFIG_USER_ONLY */
 
 #endif